Farmworkers fight back. Bernie Sanders announces bid and more…

Today on Flashpoints: Farmworkers fight back against the deadly dangers of pesticides in our foods and on the workers who pick them. Also, Bernie Sanders formally announces his bid for the presidency. We’ll have a special report on his alternative vision for labor. And our education series, The Battle for Public Education In the 21st Century continues:Today’s episode, “Breaking Through The Poverty Of Imagination”